Carbon-holder for electric lamps.



0: J. LANG. CARBON HOLDER FOB. ELECTRIC LAMPS.

APPLIOATION FILED APR.30,1908.

Patented Feb. 2, 1909.

svwwntoz 13 6 ha woe:

CARL JAMES LANG, Ui OLEANyNEW YORK.

' GARBON HOLDEBDEOR' ELEQTRIC LAMPS.

NofQllAll.

specification of Letters Patent.

"Patented-Feb. 2, 1909.

Application filed April 30, 1908, 'Serial No. 430.184=.

To alt-whom nit-may concern:

Be it knownthat I, CARL J. LANG, citizen of the'United State's,residing. at Olean, in the county of Oattaraugus and State of New .York,have invented certain new and useful improvements in' Carbon-HoldersforElectric Lamps, of which the following'is aspecification, referencebeing hadto the accompanying drawings. I V

lily-invention relatesto improvements in carbon holders for electricarc-lights or lamps, and it consistsof the novel features ofconstruction and the combination .and :ar rangement of parts hereinafterfully describedand claimed.

The object of the invention is to provide a simple-and practical deviceof thischaracter by means of which the car-hon pencil maybe securelyclamped in an adjusted positionand which be effectively insulatedfrom'the other 'portions of 'the lam'p.

The'above and other objects of the inventionpas wv-ill' hereinafterappear, are attained in its preferredembodiment illustrated intheaccompanying drawings, in which Figure 1 is aplan view of my improvedcarbon holder; 2 is a side elevation of the-samefFig. -'3 is alongitudinalsection; and Fig. 4 is'a detail' transverse section taken onthe plane-indicated bythe-line 44 in My improved carbon holdercomprises-an aidjustable arm l-oomposed of two sections 2,

which areinsulated from each other but rigidly connected, one sectioncarrying ea clamping device for the-carbon pencil or stick and ;abinding one terminal of the e ectric circuit and the other section beingadjustably connected to thesupporting or'attaching member 4 which isarranged upon the feed mechanism of the lamp. The insulating jointbetween the sections 2, 3 of thearm 1 is formed by squaring theinnerends of said sections and recessing their opposing faces, as at 5,so that they fit each other and forming said overlapping or interlockingends-with alined openings 6 to receive a clamping bolt or the like 7. Abushing or sleeve f mica or other insulating material is arranged uponthe bolt in the opening 6 and the head of said bolt is preferablycountersunk or flush with the outer face of the section 2, as shown, theother threaded end of said bolt having a clamping like 9 is a 0 arrangedbetween the recessed nut arran ed upon it. A strip of mica or the 0st orconnection for and overlapping inner ends 5 01'' the sections 1, .2 tocflectively" insulate one from the other. The section 3 of the arm hasits outer end pivoted in a forked portion 10 of theattaching member 4and it is adapted to be clamped in an adjusted angular position in saidportion l0 by its pivoting'screw 11.

The latter has at one end. a shouldered enlargement .and ahead orfingerpiece 12 and at its other end screw threads which engage 'a threadedopening in one branch of the forked portion 10. The forked portion 10 ofthe attaching member is offset from its body portion, which latterisformed with avertical openin 4* to receive one of the feed bars of Ianarcight feed mechanism of any form and construction. Said body ortionof the member 4 is also formed with a. horizontal socket 4." which opensinto the vertical opening 4 ,;said socket being of such size as toreceive the feed bar andthereby permit the holderito be disposedieithervertically or horizontally.

'W'hcn'the feed bar is arranged in. the verticalwopenin-g :4 theattaching member or body 4' will be disposed horizontally and theadjustably pinoted v.ar nl zl will also be disposed horizontally orapproximately so; but when said feed bar. is arranged in' the socketoi'opening' 4 the attaching member orbody is turned on the pivot 1 1a toav'ertical'plane or i at right angles to the arm 1, which latter isalways disposed in a. horizontal or lapproximately horizontal plane.,;.'1he2prov1s1on of the socket 4* also i. ermitsrthewattaching memberor body-etc e secured onzany horizontalstud .or projection that may beenthe i feed bar. i

A -set-. screw.13 is arranged in a threaded opening in the body portionof theattaching member at a point 0 posite the intersection of theopenings or soc ets'4 4 so that it will impinge against the feed barwhen inserted in either of said openings or sockets. The 7 section 2 ofthe vertical swinging arm 1 has its outer endenlarged and formed with atransverse groove or recess .14 which forms onejaw of a carbon clamp,theother similar 'a'w 15 of which is formed by a 1 ed at one end to theouter end 0 the section'2 and-adapted to have its other or 'free .endsecuredto-the' inner portion of the sec-' tion 2 by means-of a screw 17and a clamping nut '18; The screw 17 is pivoted at 19 in a recess orslot formedin the section 2 and it is adapted to swing into and'out of anotch or late 16 I lli) . ets or openings to receive the feed rod of an.

Cir

two sections of the arm.

renders the invention exceedingly eflective T re nut 18 igs and with astationary i or flange which bears against the "ace the jaw member Thehinge connection between the two jaw members is preferably formed bybiiurcating the outer.

end of the section 2 and reducing the inner end of the member 16, asshown at 21, andsecuring said reduced end 21 in the bifurcated portionof the section 2 by means of a pivot pin I i i 23 denotes a postprojecting from the inber 2 and formed Witha socket to receive one ofthe terminals of the electriocirhe wire may be secured in the socket yset screw 24. icy providing the adjustable pivotal eonlection comprisingthe partslO, 11 between the attaching member or body 4 and the carbonsupportin arm 3. and by inakirigsaid arm of rigidly and permanentlyconnected insulated sections and attaching the circuit Wire to theoutersection which carries the carbon, it will be seen that the inner sectionof said arm may be swung or tilted to any angle and securely clamped. insuch position without danger of wearing or weakening the.

d goint or connection between the This construction insuia for use onare lamps used in moving picture machines because it'isfrequentlynecessary to adjust the carbon both vertically and angularlyin order to secure an effective light.

Having thus described my invention What i claim is:

1. A device of the character described comprising an attaching memberhaving a body portion formed with intersecting sockarc-larnp, a setscrew arranged in a threaded pening in the body portion and adapted toimpinge against the feed rod inserted in either of said openings orsockets, an adj ust able arm carried by the body portion and consistingof rigidly connected sections in sulated from each other and means uponsaid arm for supporting a carbon.

2. (l6VIC6 of the character described so formed in the i'ree end of thejaw; arc lamp, a set screw arranged in the thread- 18 preferably prol edopening in the body portion and adapted to impinge against the feed rodinserted in H r of said openings or sockets, said body oi men being alsoformed with forked ortion haying alining apertures in its branc es, theanerture in one branch being screw threa ed, a carbon carrying armconsisting of insulated sections and having an apertured end arrangedbetween the branches of the forked part of the body portion and havingits aperture in alinement with the apertures in said branches, a thumbscrew arranged in said alining apertures and havin a shoulder at one end"to engage one of sai branches and a threaded portion at its other endto-engage' the threads in the aperture of the other branch Wherebysaidarm is pivot- .socket or opening to receive the feed rod of an electriclamp, a set screw for rigidly securin'g said member to the feed rod,said member being also formed with a forked portion hav ing spacedbranches provided with alining a ,ertures, one of the latter being screwt readed, a carbon carrying arm consisting of insulated sections andhaving .one end aperturod to enter between the spaced branches of theforked portion of the member and t have its aperture aline with those insaid branches, and a clamping screw arranged in said alining aperturesand haviru a shoulder at one end to engage one of said branches and athreaded portion at its other end to engage the threads in the apertureof the other branch whereby said arm is pivotaily mounted upon themember and maybe clamped in any angular position with respect thereto. I

In testimony whereof I hereunto affix my signature in tire. presence oftWo Witnesses. CARL JAMES LANG.

Witnesses:

C. K. CALKINs; GLEN Vt Arms.

